Xbox 360 Aquatic Update Crashes

Every time I launch the game on my Xbox 360 since the update today, it crashes. The Xbox goes sub 1 FPE (even in the menu) until I go back to the Xbox home, then it immediately fixes. Wondering if there is any simple solution, and more importantly, is there one where I will be able to keep my worlds?

Edit: If I go on another account without Xbox Live on my Xbox, then it works fine. Any account with it freezes.